Understanding Beef Sire Summaries

– Heather Schlesser, Agriculture Educator in Marathon County, Wisconsin Extension

EPDs predict the genetic potential of future offspring of a particular bull.

Selecting a herd bull is one of the most important decisions a producer has to make. The decision of selecting what bull to mate to each cow or heifer has long lasting genetics effects in the herd. Sire summaries have been developed to aid producer’s in this decision. Sire summaries are updated on an annual basis and provide information on traits that are economically important to cattle producers.

The producer needs to decide which traits are most important to their farming operation. For example, a farm marketing feeder calves may place a greater emphasis on weaning weight rather than yearling weight. Most breeds also have Index values. An Index takes multiple traits and combines their values to create one number or ranking per bull, simplifying the amount of information producers need to analyze. Depending on the breed, Index’s may be general, or specific to maternal or terminal traits.

Expected Progeny Differences (EPDs) predict the genetic potential of . . .

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